211230240 has 96 divisors (see below), whose sum is σ = 716579136. Its totient is φ = 51993600.

The previous prime is 211230221. The next prime is 211230247. The reversal of 211230240 is 42032112.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (211230247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10686 + ... + 23165.

It is an arithmetic number, because the mean of its divisors is an integer number (7464366).

Almost surely, 2^211230240 is an apocalyptic number.

211230240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211230240 is an abundant number, since it is smaller than the sum of its proper divisors (505348896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211230240 is a wasteful number, since it uses less digits than its factorization.

211230240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33882 (or 33874 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 211230240 is about 14533.7620731867. The cubic root of 211230240 is about 595.5506424766.

Adding to 211230240 its reverse (42032112), we get a palindrome (253262352).

The spelling of 211230240 in words is "two hundred eleven million, two hundred thirty thousand, two hundred forty".